Walkerton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.2 °F (low) to 59.5 °F (high). Annual precipitation averages 40.1 Inches. Walkerton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.6 °F | 31.8 °F | 2.59 in. |
| February | 19.2 °F | 35.6 °F | 2.26 in. |
| March | 27.6 °F | 46.9 °F | 2.3 in. |
| April | 38.0 °F | 59.5 °F | 3.54 in. |
| May | 49.5 °F | 70.8 °F | 4.34 in. |
| June | 59.4 °F | 80.0 °F | 4.38 in. |
| July | 62.2 °F | 83.0 °F | 4.32 in. |
| August | 60.4 °F | 81.2 °F | 4.19 in. |
| September | 52.8 °F | 75.8 °F | 3.36 in. |
| October | 41.6 °F | 63.4 °F | 3.45 in. |
| November | 31.8 °F | 48.8 °F | 2.97 in. |
| December | 22.7 °F | 37.1 °F | 2.43 in. |
| Annual | 40.2 °F | 59.5 °F | 40.13 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |